Table 1.

Summary of elemental composition of C. reinhardtii and D. magna

Experimental groups	C. reinhardtii		D. magna
	C:N (Mean ± SD)	C:P (Mean ± SD)	C:N (Mean ± SD)	C:P (Mean ± SD)
Control	7.5 ± 0.2	65.0 ± 6.1	12.1 ± 1.0	19.1 ± 0.7
N-limitation	16.7 ± 0.1	74.3 ± 8.7	16.0 ± 1.4	20.9 ± 1.2
P-limitation	15.4 ± 0.3	467.7 ± 89.8	20.9 ± 1.2	22.3 ± 1.0
Germ-free Control	6.7 ± 0.4	57.4 ± 5.8	15.1 ± 0.7	20.0 ± 0.8
Germ-free N-limitation	14.5 ± 0.5	67.1 ± 4.6	17.4 ± 1.1	21.1 ± 1.3
Germ-free P-limitation	13.7 ± 0.7	551.4 ± 71.4	21.1 ± 0.6	22.1 ± 0.8

Mean mean value for different elemental ratio

SD standard deviation